Obed
Elite Member
We prefer the hard ductwork over the flexible. Air flows through the hard ductwork with less resistance than through the flexible stuff. In addition, we have observed several new construction homes that had some really cheap looking flexible ductwork for the bath, dryer, and kitchen hood vents. Another consideration is condensation. Warm humid air from shower vents and dryer vents that flow through cooler ductwork will condensate and form water. Since the flexible ducts dip down between the hangers, water tends to collect in the low spots and form pools of water inside the flexible ductwork. Hard ducts sloped downward will let the condensated water flow down the duct and drain outside of the house.
My father-n-law either cleaned out or replaced a flexible dryer duct for someone he knew. The dryer duct had clogged up with lint and failed. When he inspected the duct, he found large amounts of water pooled in the low spots along the entire run of the ductwork. He believes that the water standing in the ductwork caused the lint to collect and clog the ductwork.
Thus, we specified the hard ductwork for all our bathroom, laundry, and kitchen vents. We also specified the hard ductwork for the main H&A trunk and return lines.
Obed
My father-n-law either cleaned out or replaced a flexible dryer duct for someone he knew. The dryer duct had clogged up with lint and failed. When he inspected the duct, he found large amounts of water pooled in the low spots along the entire run of the ductwork. He believes that the water standing in the ductwork caused the lint to collect and clog the ductwork.
Thus, we specified the hard ductwork for all our bathroom, laundry, and kitchen vents. We also specified the hard ductwork for the main H&A trunk and return lines.
Obed